Hi guys.

Can you guess the title of my next video Hurry up.

Write your guess in the comments section below.

Why does my dog stink when it is wet?

Because water washes away their perfume.

No.

Many microbes like bacteria and fungi live in the fur of a dog.

These microbes excrete waste in the form of volatile organic compounds or VOCs.

These VOCs are responsible for the stink.

Now usually, when the dog is dry, some VOCs evaporate into air.

So, the stink or smell is hardly noticeable.

However, when the dog plays in water or bathes.

The water liberates most of the VOCs from its skin and fur into air

Thus making the stink more noticeable.

In addition to this, some VOCs even dissolve in water.

As this water evaporates, it carries the VOCs with it, thus contributing to the stink.

Also, as the water evaporates, it increases the humidity in the air surrounding the dog.

Humid air can hold more molecules.

So, a higher concentration of VOCs reaches our nose, thus intensifying the stink.

Why is glass transparent?

Give me minimum 5 years to unravel its mystery.

Alright.

Now listen.

Any substance is said to be transparent.

When particles of visible light called photons are not absorbed by the substance.

Thus, they easily pass through the substance.

However, if the photons get absorbed, then the substance is said to be opaque.

But why do some substances absorb photons while others don't?

Whether a substance will absorb the photons or not.

Depends upon the gaps present in between the orbits of electrons of that substance.

If the gaps in a substance are small.

Then the electrons of that substance are able to absorb the photons.

Which pass through those gaps, making the substance opaque.

However, in glass, the gaps are big.

Hence, most of the photons do not get absorbed.

They easily pass through those gaps, making glass transparent.

Is antibacterial soap bad for you?

Nope.

It is not at all bad.

As usual, you are wrong.

Antibacterial soaps claim that they destroy or remove more germs or bacteria.

As compared to regular soaps.

However, this is not completely true.

Antibacterial soaps contain various chemicals such as triclosan.

Triclocarban that actually don't do any benefit, but instead they harm us.

Stop bluffing.

Please listen.

Long term exposure to triclosan can create antibiotic resistant bacteria or super bacteria.

How is that possible?

When we use antibacterial soaps that contain triclosan.

It may kill most of the bacteria present on our body.

But the remaining ones that survived could divide and pass on the resistance to other bacteria.

Thus creating super bacteria which are more difficult to kill.

Besides this, as triclosan penetrates the skin, it can also cause various health problems.

Hence, it is advised to use regular soaps.

Topic: Surface tension.

Why are drops spherical?

Because, personally, I'm fond of spherical shapes as compared to squares.

No.

It is because of surface tension.

Surface tension is the property of liquids.

By which surface molecules of a liquid try to hold the liquid together.

By acquiring minimum surface area and acting like a stretched membrane.

You know what, everything just went over my head.

Alright.

I'll explain.

Inside a drop, each water molecule is pulled with a force by its neighboring molecules.

As these forces are equal and opposite, they get neutralized.

However, the molecule present at the surface is not attracted outwards.

It is attracted only inwards and sideways.

Sideways forces get neutralized.

But because of the inward force.

Each surface molecule contracts to form a shape that has minimum surface area which is a sphere.

Topic: Rancidity.

Why is a bag of chips half full?

Looks like you don't believe me.

Open the bag.

See I told you.

The bag of chips is indeed half full.

Why is that so?

It is mainly because of a concept called rancidity.

When food becomes rancid.

It develops an unpleasant smell and taste and it becomes unsafe for consumption.

Rancidity generally refers to a condition where the fats and oils present in food get oxidized.

Resulting in food spoilage.

Since the chips contain fats and oils, they are likely to get rancid.

Therefore, to prevent this, nitrogen gas is flushed into bags of chips by manufacturers.

But, why nitrogen?

Nitrogen does not react with fats and oils.

As a result, rancidity does not take place.

Moreover, a gas in the bag serves as a cushioning agent and prevents the chips from crumbling.

That is why the bag of chips is only filled till half.